Short clean riddles

Each morning I appear to lie at your feet. All day I will follow no matter how fast you run, yet I nearly perish in the midday sun.

You measure my life in hours and I serve you by expiring. I'm quick when I'm thin and slow when I'm fat. The wind is my enemy.

My life can be measured in hours. I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.

I look taller when I am young. But as I get old, I become shorter and shorter. What Am I?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place.

The thunder comes before the lightning; the lightning comes before the clouds. The rain dries everything it touches. What am I?

What has a head and a tail, but no body?

Born of water, I drown in water. A blood-thirsty beast you can barely see. What am I?

When does Christmas come before Thanksgiving?

I am the biggest alphabet, as I contain the most water in the world. Who am I?